Questions asked by junkersta

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• 1) What is the arc length of C? 2) The surface of revolution on the x axis?
  
• What is the arc length of #y=1/3 (x^2 + 2)^(3/2) (0 <= x <= 1) #?
  
• What is the arclength of #y=sqrt(x-x^2) + sin^(-1) (sqrtx) , (0<= x <= 1) #?
  
• Arrange the following six atoms or ions in order of size, from smallest to largest.? #K, F^+, Rb, Co^(25+), Br, F, Rb ^- #
  
• (PLS HELP) A rigid tank 30.0L is filled with hydrogen gas as a fuel. The initial pressure is 16.0atm and the initial temperature is 298K. After the commissioning, the temperature remains 298K but the pressure was 4.0atm. Find a) and b)?
  
• 1.00mol of propene sample is placed in an oxygen filled calorimeter and burned. The starting temperature of the calorimeter is 25.00°C and its total heat capacity is 97.1kJ/°C. The temperature of the calorimeter increased to 27.282°C. Find a), b) and c)?
  
• A two dimensional square box with a corner length L, the energy level of a particle with a mass #h^2/(8mL^2)(n_1^2+n_2^2)# . What is the quantum number of the first, second and third degenerate energy levels?
  
• The method of bleaching paper pulp with chlorine is replaced by a green chemical method using non toxic chemicals. Chlorine is highly oxidizing, producing toxic by products such as furans and dioxins in organic chemicals. find a), b) and c)?
  
• When light with a wavelength of 58.4nm was applied to a rubidium atom, electrons with a velocity of 2450 #kms^-1# were emitted. What is the ionization energy of a rubidium atom? (1J= #1kgm^2s^-2#)
  
• (help pls)A wooden rod is placed on top of the piston, performs a vertical simple harmonic motion. find 1) and 2)?
  
• Place a rectangular book with a length L in parallel with the end line of the desk and push it a little by little. How long can a book go out of the desk without falling off? (use the statics and equilibrium concepts to explain this)